I painted my OC, Laina with Acrylics on a 15" x 20" cold press board. I took a photo and edited on Photoshop. The bright light on the corner came from the photo and I don't mind it there
I'd try to define her lips a bit more and maybe add some more colours to her hair (like brown or blue, depending on the type of black her has), but it's very nice. And wow, I should rejoin the group...
I just checked and it's called, the ruling pen cross joint [link] the teacher showed us once how to apply acrylic to it to make nice clean lines with it, but I haven't tried it yet so